Schaefer, R. T. (1988). Racial and ethnic groups (3rd ed.). Scott, Foresman.
芝加哥风格引文Schaefer, Richard T. Racial and Ethnic Groups. 3rd ed. Glenview, Ill.: Scott, Foresman, 1988.
MLA引文Schaefer, Richard T. Racial and Ethnic Groups. 3rd ed. Scott, Foresman, 1988.
警告：这些引文格式不一定是100％准确.